package jp.ac.u_ryukyu.ie.cr.jungle.core.nodeeditor;

import jp.ac.u_ryukyu.ie.cr.jungle.DefaultJungle;
import jp.ac.u_ryukyu.ie.cr.jungle.Jungle;
import jp.ac.u_ryukyu.ie.cr.jungle.JungleTree;
import jp.ac.u_ryukyu.ie.cr.jungle.JungleTreeEditor;
import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.DefaultTreeEditor;
import jp.ac.u_ryukyu.ie.cr.jungle.traverser.DefaultTraverser;
import jp.ac.u_ryukyu.ie.cr.jungle.store.impl.TreeNode;
import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;
import jp.ac.u_ryukyu.ie.cr.jungle.util.Error;
import junit.framework.Assert;

import org.junit.Test;

public class ReplaceRootNodeAt {

  @Test
  public void ReplaceRootNodeAtTest() {
    Jungle jungle = new DefaultJungle(null, "hogehoge", new DefaultTreeEditor(new DefaultTraverser()));
    jungle.createNewTree("tree");
    JungleTree tree = jungle.getTreeByName("tree");
    JungleTreeEditor editor = tree.getTreeEditor();
    
    TreeNode oldRoot = tree.getRootNode();
    Either<Error, JungleTreeEditor> either = editor.replaceNewRootNode();
    Assert.assertTrue(either.isB());
    JungleTreeEditor newTreeEditor = either.b();
    Assert.assertTrue(newTreeEditor.success().isB());
    TreeNode newRoot = tree.getRootNode();
    Assert.assertFalse(oldRoot.equals(newRoot));
    
    Either<jp.ac.u_ryukyu.ie.cr.jungle.util.Error, TreeNode> childrenEither = newRoot.getChildren().at(0);
    Assert.assertTrue(childrenEither.isB());
    TreeNode newRootChildren = childrenEither.b();
    Assert.assertEquals(oldRoot, newRootChildren);
  }
}